self inductance how !!!!!!!!!!!!!!!!!!

[mhmd.sh89]

hi everyone

we know that faraday has discovered that the change in current (magnetic field) create an opposite voltage in the inductor.
ok it's a experience

but can i know why physically and by images if you can ??
why oppose a change in current , and not in current itself (how)

I didn't find any good explanation about self inductance or a book !!


why we don't see in a transformer a result with a dc voltage but we do with an ac .

if anyone can help ?

thanx very much

 

[godfreyl]

why we don't see in a transformer a result with a dc voltage but we do with an ac .

Change in current causes change in magnetic field, which causes induced voltage.

With DC, current is constant, so magnetic field does not change and there is no induced voltage.

 

[js]

You can see this:
https://www.youtube.com/watch?v=B8CPGiK59f8&feature=youtube_gdata_player

 

[BradtheRad]

My Youtube videos show animated simulations of inductor behavior.
They portray the flux field growing and collapsing, the EMF changing, and current bundles flowing through wires.

Inductor behavior with DC (Animated):

https://www.youtube.com/watch?v=LVNxrN4jgvs\

Inductor behavior with AC (Animated). Showing response to several waveforms.

https://www.youtube.com/watch?v=Os3jF9UeMoE

 

[mhmd.sh89]

thank you very much

i wanna see it and i want reply

thanx